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Finding the Fourth Proportional to 2,125.92, 3,189.15 and 739.36

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Solution

The fourth proportional to 2,125.92, 3,189.15 and 739.36 is: 1,109.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.92 : 3,189.15 = 739.36 : x
  2. Step 2: Convert to fraction form
    2,125.92/3,189.15 = 739.36/x
  3. Step 3: Cross multiply
    2,125.92x = 3,189.15 × 739.36
  4. Step 4: Simplify right side
    2,125.92x = 2,357,924.74
  5. Step 5: Solve for x
    x = 2,357,924.74/2,125.92
  6. Step 6: Final answer
    x = 1,109.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.